Arrow



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ll... TENGEL ARROW Filed Mardh 11, 19:52

INVENTOR.

Patented Apr. 30, 1935 UNITED STATES PATENT OFFICE ARROW ApplicationMarch 11, 1932, Serial No. 598,238

8 Claims. (01. 273-1065) This invention relates to arrows and relatesmore particularly to arrows the shafts of which are composed of tubularmetal.

As illustrative of the construction of arrow to 6 which my invention isparticularly applicable,

reference may be had to the patent of Robert H.

Cowdery, No. 1,842,540, January 26,1932.

The shaft of an arrow tends to vibrate during flight and upon impactwith the target, and when the shaft is constructed from tubular metal,this vibration emits a harsh and metallic sound which is mostobjectionable to the archer, accustomed to the use of wood arrows.

Various attempts have been made to subdue the sound vibrations.vAlthough the hollow tubular steel shaft may be loosely filled with asound deadening or absorbing material such as cork, asbestos wool, or'the like, after continued use of an arrow having such sound deadeningconstruc: tion, the repeated violent impact of the arrow often effects aforward movement of the sound deadening material in the shaft, and tendsto cause it to accumulate at or adjacent the pile endthereof, and totemporarily unbalance the shaft, and destroy its sound subduingfunction.

It istherefore an object of thisinventionto provide a tubular shaftarrow having improved means for absorbing sound vibrationsthereofincidental to flight and impact.

Another object is to provide an arrow having a metallic tubular shaftand an improved means within the shaft to deaden or absorb soundvibrations thereof incidental to flight and impact.

' Anotherobject is to provide, in an arrow having a metallic tubularshaft, an improved sound absorbing filler for the shaft.

Another object of my invention is to provide, in an arrowhaving atubular metallic shaft, and a sound absorbing material within the shaft,an improved means for maintaining the sound absorbing property of thematerial throughout continuous use of the arrow.

Another object is to provide, in an arrow having a metallic tubularshaft, a sound deadening or absorbing material within the shaft,improved means for preventing compacting of the material in the shaftwhen the arrow is subjected to impact at the pile end.

Another object is to provide an improved arrow of the metallic tubularshaft type.

Other objects will be apparent to those skilled in the art to which myinvention appertains.

My invention is fully disclosed in the following description taken inconnection with the accompanying drawing, in which:

Fig. 1 is a side elevational View partly in crosssection of an arrowembodying my invention in one form thereof;

Fig. 2 is a cross-sectional view taken from the plane 2-2 of'Fig. 1;

Fig. 3 isa longitudinal cross-sectional view taken approximately fromthe plane 3-3 of Fig. 1;

Fig. 4 is a View similar to Fig. 1 illustrating another embodiment of myinvention;

1 Fig. 5 is a cross-sectional view of the embodiment of Fig. 4 takenfrom the plane 5 of Fig. 4;

and

Fig. 6 is a view like that of Fig. 4 taken at right angles thereto;

Figs. 7 and 8 are views similar to Fig. 1 showing another embodiment ofmy invention.'

Referring to the'drawing, Fig. l, I have shown at I the shaft of thearrow, formed from a thinwalled metal tube and having secured thereto atone end a pile 2 and at the other end a nock element 3. The pile 2 maybe of any suitable construction butpreferably is formed from metal, ispointed atone end as at 4, and at the other end has a shank 5 of reduceddiameter to provide a shoulder 6 and the shank 5 is telescoped into thecorresponding end of the shaft l, with the end of the shaft abuttingagainst the shoulder 6." The inner end of the shank 5 terminates in atransverse face 1.

The nock element 3 is likewise preferably formed from metal and hasanexternal portion 8 provided with a bow-receiving notch 9 and aninternal shank it of reduced diameter which provides a shoulder llagainst which the corresponding end of the shaft I may abut when theshank I0 is telescoped within the shaft. And the shank Ill terminatesinwardly in a transverse face I2. Indicated generally at is is a filler,which is provided to deaden or absorb the sound which the arrow tends togive 01f during flight or at impact. The filler it has in general theconstruction of the well known corrugated paper board used as a packingmaterial, and for the construction of packing boxes and like uses, andcom prises a pair of planular strips I l-I4 and wavelike or corrugatedstrip l5 therebetween, the three strips being secured to each other byadhesive.

The filler It may be provided by cutting strips from a sheet ofcorrugated paper or paper board material such as that referred to aboveand which I is well known today as an article of commerce.

The filler I3 is preferably constructed or provided of such dimensionthat when viewed in cross-section as in Fig. 1, the planular strips I4-M are spaced apart a lesser distance than the internal diameter of theshaft I. And in the opposite direction, that is, as viewed in Fig. 3,the strips I4I4 and the strips I5 are preferably of such width as tosubstantially engage the opposite inner walls of the tubular shaft I.

The filler I3 is preferably cut off square at its opposite ends and ispreferably of a length sufi'lcient to extend from the rear end 1 of thepile,

only a part of the way toward the rear end of the shaft which ispreferably left unfilled. The filler is very light and if uncemented tothe interior walls of the shaft will in use be impelled against the endI of the pile by its momentum, whenever the arrow is used, and the point4 strikes an objective.

I find that best results are secured by incompletely filling the tubeand by employing the cellular construction provided by the corrugatedboard, or in any suitable way. The filler I3, as will be understood, ismade up as a complete unit and telescopically inserted into the metalshaft I, preferably through the open end opposite the pile 2 before thenock element 3 is assembled with the shaft, and before so inserting thefiller I3, adhesive may be applied to the forward end of the filler Itto cause it to adhere to the rear end surface of the pile, at 7,although this is not imperative. 7

When the filleris telescopically inserted into the shaft, and when theadhesive is employed, its forward end engages the face I. By suitablyproportioning the width of the filler I3, it will engage the oppositeinner wall surfaces of the shaft I on four or approximately four linesof contact therewith as indicated by the reference numeral I? in Fig. 2;and vibration of the .shaft wall will be absorbed or prevented by thefiller I3 thereby eliminating or deadening the sound of the arrow abovereferred to.

Obviously, the pressure of the filler 3 up n the inner wall of the shaftI is a resilient pressure and may be varied, as desired, by preselectinga suitable width for the fillerl3.

In some instances, it may be desirable to additionally adhesively attachthe filler I3 to the inner wall of the shaft I, and this may be done byapplying adhesive at spaced points lngitudinally of the inner wall ofthe shaft I or longig tudinally of the filler I3 in any suitable manner.

Inthis connection, also, it will be understood that in assembling thearrow, the nook element 3 may first be assembled with the shaft I andthe adhesive connection between the filler I3 and the nook element 3, orbetween the filler I3 and the inner wall of the shaft I, or both, may beeffected only at or substantially only at the nook end of the arrow, andthe adhesive connection at the pile end may, if desired, be omitted.

In the modification of my invention shown in Figs. 4, 5., and 6, thefiller 2a is made from a strip of felt which in width is wide enough toengage the opposite inner walls of the shaft I and in thickness is lessthan the internal diameter of the shaft. The filler 28 may be adhesivelysecured to the inner wall of the shaft I and/or to the nook element 3,not shown, in any or all of the ways described in connection with Figs.1, 2 and 3, and this will be understood from the more completedescription of the latter figures, the operation of the form of Figs. 4and 5 being substantially the same as that of Figs. 1, 2 and 3 for thefiller I3. Instead of felt, leather or other analogous material may beemployed for the filler 20.

Although Fig. 6 illustrates the filler 20 as extending the entire lengthof the tubular space within the arrow, it will be understood that Icontemplate sometimes employing relatively shorter lengths of saidfiller extending preferably from the forward or pile end of the interiorspace and rearwardly therefrom.

In the embodiments of Figs. 1 to 3 inclusive, and 4 to 6 inclusive,where a short length of filler is used, as is preferable, since thisgives the most efficient results so far as sound deadening is concerned,especially for the weight of filler used, I preferably extend the fillerfor a distance of about eight inches from the rear end of the pile for astandardized target arrow 28 inches in length, although fillers ofvarying lengths may be employed. Both the felt 20 or the corrugatedboard filler I3 may be said to be of cellular construction, i. e.provided with a form sustaining material, with air spaces within theouter confines of the material, and wherein the appended claims I employthe term cellular material, it will be understood that I employ it inthe meaning as above defined.

In any of the arrows with fillers, above described, it will be seen thatI provide an arrow having an efficient sound absorbing or deaden ingfiller in the tubular shaft secured therein in a manner to preventshifting longitudinally, and which filler therefore will continuethroughout the life of the arrow to perform its sound deadening orabsorbing function without deterioration; also that my improved fillerbeing of very light cellular construction, and especially in the formswhere only a short length thereof is used, is very light and does notmaterially add to the weight of the arrow, but for its weight exercisesa very substantial sound vibration deadening effect .on the tubularwalls of the arrow; and I find that when this effect is exercised on a.relatively short length of the tubular walls that the balance of thelength of said walls is constrained thereby to have no vibrationalproperties, whereby a tubular metallic arrow'is evolved which does nothave to any objectionable degree the metallic rasping sound otherwisehad by metallic arrows. I I The improved filler material described abovewill not compact toward the forward end of the shaft causing a shiftingof weight and therefore of balance of the arrow, whereby differentarrows would operate differently, which would be very objectionable intarget and other uses to which the arrows are subjected.

My invention is not limited to the exact details of construction shownand described. Many changes and modifications may be made therein Withot d pa i from the spirit of myinvention or sacrificing its advantages.

I claim:

1. In an arrow, a tubular metallic shaft and unitary sound-vibrationdeadening filler means extending longitudinally therein and said fillerbeing form sustaining and engagedat a point within the shaft to restrainlongitudinal shifting therein.

2. In an arrow, a tubular metallic shaft and a cellular unitarysound-deadening means engage ing the inner walls thereof, andsaid fillerbeing form sustaining and comprising a pair of substantially linear sidep rtions and an intermediate corrugated portion.

3. In an arrow, a tubular metallic shaft and a unitary sound-vibrationsuppressing means disposed longitudinally in the shaft and securedthereto, being of resiliently compressible material in the form of astriphaving agmtu width than thickness and engaging inner walls of theshaft by only a pair of oppositely disposed longitudinal edge portionsand comprising a longitudinally corrugated element.

4. In an arrow, a tubular metallic shaft and a unitary sound-vibrationsuppressing means disposed longitudinally in the shaft and securedthereto, being of resiliently compressible material in the form of astrip having a greater width than thickness and engaging inner walls ofthe shaft by only a pair of oppositely disposed longitudinal edgeportions.

5. In an arrow, a tubular metallic shaft and a unitary sound-vibrationsuppressing means disposed longitudinally in the shaft and securedthereto, being of resiliently compressible material in the form of astrip having a greater width than thickness and engaging inner walls ofthe shaft by only a pair of oppositely disposed longitudinal edgeportions and comprising a longitudinally corrugated element, and closuremeans at the two ends of the shaft comprising respectively a pile andhook elements, each of said elements having relatively short stemportions of slightly reduced diameters tightly fitted within the shaftends.

6. In an arrow, a tubular metallic shaft and unitary sound-vibrationdeadening filler means adapted to be separately made and telescopical-1y inserted into the tubular shaft and disposed longitudinally therein,said filler means being of form sustaining material and construction andsecured to the inner wall of the shaft to restrain the filler means as aunit from longitudinal shifting therein.

'7. In an arrow, a tubular metallic shaft and sound-vibration deadeningfiller means extending longitudinally therein, said filler means beingform sustaining, and means disposed within the shaft to restrainlongitudinal shifting of the filler means therein.

8. In an arrow, a tubular metallic shaft and a filler means extendinglongitudinally therein, the filler means being formed from materialadapted to deaden sound vibrations of the shaft, and the material of thefiller means being secured to the shaft inner wall surface in a mannerto prevent longitudinal shifting thereof in the shaft at all pointslongitudinally of the filler means upon violent impact of the pile endof the arrow upon a target.

' LOUIS TENGEL.

